6063 aluminum alloy is one of the most advanced aluminum alloys in the world today. It has outstanding formability (melting castability, plastic formability, weldability), medium specific strength, good corrosion resistance, superior damage tolerance.etc. It is widely used for large civil aircraft, military carrier aircraft, rail transit and other fields.
6063 aluminum is a medium-strength heat-treatable and strengthened alloy in the AL-Mg-Si series. Mg and Si are the main alloy elements, which have great effect on the 6063 aluminum properties.
Mg and Si form the strengthening phase Mg2Si. The higher the content of Mg, the greater the amount of Mg2Si, the greater the heat treatment strengthening effect, the higher the tensile strength of the profile, but the deformation resistance also increases, and the plasticity and corrosion resistance of the 6063 alloy decreases.
The Si element ensure Mg in the alloy all exist in the form of Mg2Si phase. As the Si content increases, the grains of the alloy become finer, the fluidity of the metal increases, the casting performance becomes better, the heat treatment strengthening effect increases, the tensile strength of the profile increases but the plasticity decreases.
Chemical Composition
Alloy | Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti | Al |
6063 | 0.2-0.6 | 0.0-0.35 | ≤0.1 | ≤0.1 | 0.45-0.9 | ≤0.10 | ≤0.1 | ≤0.10 | remainder |
Mechanical Position
Tensile strength : 130-230 MPa
Yield strength: 55.2 MPa
Elasticity coefficient: 68.9 GPa
Bending ultimate strength: 228 MPa
Poisson's ratio: 0.330
Fatigue strength: 62.1 MPa
Solution temperature: 520℃
Annealing temperature: 415℃×(2-3)h to 28℃/h
Cooling rate: from 415°C to 260°C
Melting temperature: 615-655℃
Specific heat capacity: 900
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